Air-filter



'FLA-D AIR FILTER.

No. 298,548'. Patented Apr. 8, 1884.

K nv VENTUH 042406 Vf 742 f' TNESSES vlf! Harney UNITED STATES' ArnN'r trice.

` HENRY FLM), or sr. Louis, Missoula.

AIR-FILTER.

SPECIFICATION forming part of LettersPai-.ent No. 296,548, dated April 8, 1884.

' Application filed June 14, 1883. (No model.)

To all whom it may concern:

Be it known that I, HENRY FLAD, of St. Louis, in the county eist. Louis and State of Missouri, have invented certain new and nseful Improvements in Air-Filters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of this invention is to prevent dust and other solid matter from entering ain pumps and other pneumatic cylinders or chambers through their induction ports or passages, the invention being particularly designed for use, in connection with the air pumps and cylinders employed for operating the brakes' of raiiwaynars, according to an invention described in an application for patent for in1- provement in electric air-brakes, filed by me June 7, 1883. In said application I have shown and described brakeoperating cylinders with,- in which are nicely-iitted valves, the faces and bearings of which would be liable to injury from dust and cinder which pervade the air in the vicinity of railway-trains, and more or less oi' which would enter the brake-cylinder were not means for intercepting it provided.

Figure l is a rear view of a locomotive-cab provided with an air-filter connected with an air-pump used for supplying air in the ordinary manner for operating car-brakes, the roof of the cab and parts composing the filter be- :ing shown in section. Fig. 2 is a section in plane indicated by the line x x of Fig. l.

Referring to Fig. 1, the letter A designates the roof of the c ab, and a short distance below it is a light partition, B. This partition B,

`stantially as described.

other by an intervening space of, in practice, about four or tive inches depth. The edges of the screens are secured to suitable cleats, e e, and the space-between said screens is filled 4 with fibrous material, preferably raw cotton, as shown at F, which, in connection with the screens, forms a filtering-diaphragm through which air may pass, but which will intercept dust, cinder, and other solid matter.

In the side walls, C C, above the screens, are formed air-passages g g, through which the external air may enter under the roof, and from an opening in the partition B under the screens a pipe, H, leads to the induction port or passage ot' theainpump I. It will now be seen that when the pump is operated and exerts suction through the pipe H the air `which enters Athe openings g will be drawn through the screens and interposed cotton, and will thus be ltered in its passage to the portion of the chamber below the screens and In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

HENRY FLAI).

itnessesz A. B. MnroaLFn, FRITZ HPPNER. 

